Table of contents

1 English 2 Japanese 2.1 3 Swedish 3.1 Etymology 3.2 Prefix

English

1. A blood type that has no antigens. It lacks the A, B and Rh factors on the blood cells. They are the universal donor for blood and can give blood to any blood type, but can only receive O- blood.

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Japanese

o- (お-)

1. Romanizaton of 御- (prefix indicating that a word is honorific)

Swedish

Etymology

From the Proto-Indo-European negative prefix *n̥- whence also eg. the Greek a- and English un-.

Prefix

o-

1. Added to adjectives to mean the opposite.
2. Added to nouns to mean lack or being without.